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Minkowski difference and Sallee elements in an ordered semigroup

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Borowska D., Grzybowski J.

Commentationes Mathematicae

2007

tom 47

nr 1

In the manner of Pallaschke and Urbański ([5], chapter 3) we generalize the notions of the Minkowski difference and Sallee sets to a semigroup. Sallee set (see [7], definition of the family \(S\) on p. 2) is a compact convex subset \(A\) of a topological vector space \(X\) such that for all subsets \(B\) the Minkowski difference \(A -B\) of the sets \(A\) and \(B\) is a summand of \(A\). The family of Sallee sets characterizes the Minkowski subtraction, which is important to the arithmetic of compact convex sets (see [5]). Sallee polytopes are related to monotypic polytopes (see [4]). We generalize properties of Minkowski difference and Sallee sets to semigroup and investigate the families of Sallee elements in several specific semigroups.

Ograniczanie wyników

1 Commentationes Mathematicae

1 Borowska D.

1 Grzybowski J.

1 2007

Wyniki wyszukiwania

Minkowski difference and Sallee elements in an ordered semigroup